Nutrition in Plants
Nutrition in Animals
- Different Ways of Taking Food
- The Digestive System in Human
- The Mouth and Buccal Cavity
- The Teeth and Its Structure
- The Salivary Glands
- The Food Pipe/Oesophagus
- The Stomach
- The Small Intestine
- Absorption of Food
- The Large Intestine
- Assimilation of Food
- Digestion in Grass-eating Animal
- Feeding and Digestion in Amoeba
Fibre to Fabric
Acids, Bases and Salts
Physical and Chemical Changes
Weather, Climate and Adaptations of Animals to Climate
Wind Storms and Cyclones
Respiration in Organisms
Transportation in Animals and Plants
Reproduction in Plants
Motion and Time
Electric Current and Its Effects
Water: A Precious Resource
Forests: Our Lifeline
Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school.
The odometer of a car reads 57321.0 km when the clock shows the time 08:30 AM. What is the distance moved by the car, if at 08:50 AM, the odometer reading has changed to 57336.0 km? Calculate the speed of the car in km/min during this time. Express the speed in km/h also.
Suppose the two photographs, shown in Figure 1 and Figure 2, had been taken at an interval of 10 seconds. If a distance of 100 metres is shown by 1 cm in these photographs, calculate the speed of the blue car.
Figure 1 Vehicles moving in the same direction of on a road
Figure 2 Position of vehicles shown in Figure 1 after some time
Which of the following are not correct?
(1) The basic unit of time is second.
(2) Every object moves with a constant speed.
(3) Distances between two cities are measured in kilometres.
(4) The time period of a given pendulum is not constant.
(5) The speed of a train is expressed in m/h.